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Papers

• Belczynski, K., et al. 2002, astro-ph/0202186
  Population synthesis of compact objects: neutron stars, strange (quark) stars and black holes
  ---most compact objects should be below 2 M_sun, but black holes (or gravastars) may have peak at 10 M_sun. If quark stars exist at all in some low mass mass range, then they could be as populous as black holes. They don't count white dwarfs as compact objects.